package top.jolyoulu.demo.protobuf.proto;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.util.Random;

/**
 * @Author: LZJ
 * @Date: 2020/10/2 20:18
 * @Version 1.0
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    //当通道就绪时就会触发
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("客户端 "+ctx);
        //发送一个随机发送对象到服务端
        int random = new Random().nextInt(3);
        MyDataInfo.MyMessage myMessage = null;
        if (0 ==random){ //发送Student对象
            myMessage = MyDataInfo.MyMessage.newBuilder().setDataType(MyDataInfo.MyMessage.DataType.StudentType)
                    .setStudent(MyDataInfo.Student.newBuilder().setName("StudentType").setId(10).build()).build();
        }else { //发送Student对象
            myMessage = MyDataInfo.MyMessage.newBuilder().setDataType(MyDataInfo.MyMessage.DataType.WorkerType)
                    .setWorker(MyDataInfo.Worker.newBuilder().setName("WorkerType").setAge(99).build()).build();
        }
        ctx.writeAndFlush(myMessage);
    }

    //当通道有读取事件时触发
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器回复消息: "+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址: "+ctx.channel().remoteAddress());
    }

    //发送异常时触发
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
